/*
   miniunz.c
   Version 1.1, February 14h, 2010
   sample part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )

         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )

         Modifications of Unzip for Zip64
         Copyright (C) 2007-2008 Even Rouault

         Modifications for Zip64 support on both zip and unzip
         Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
*/

#if (!defined(_WIN32)) && (!defined(WIN32)) && (!defined(__APPLE__))
#ifndef __USE_FILE_OFFSET64
                #define __USE_FILE_OFFSET64
#endif
#ifndef __USE_LARGEFILE64
                #define __USE_LARGEFILE64
#endif
#ifndef _LARGEFILE64_SOURCE
                #define _LARGEFILE64_SOURCE
#endif
#ifndef _FILE_OFFSET_BIT
                #define _FILE_OFFSET_BIT 64
#endif
#endif

#ifdef __APPLE__
// In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
#define FTELLO_FUNC(stream) ftello(stream)
#define FSEEKO_FUNC(stream, offset, origin) fseeko(stream, offset, origin)
#else
#define FOPEN_FUNC(filename, mode) fopen64(filename, mode)
#define FTELLO_FUNC(stream) ftello64(stream)
#define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
#endif


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <fcntl.h>

#ifdef _WIN32
# include <direct.h>
# include <io.h>
#else
# include <unistd.h>
# include <utime.h>
# include <sys/stat.h>
#endif


#include "unzip.h"

#define CASESENSITIVITY (0)
#define WRITEBUFFERSIZE (8192)
#define MAXFILENAME (256)

#ifdef _WIN32
#define USEWIN32IOAPI
#include "iowin32.h"
#endif
/*
  mini unzip, demo of unzip package

  usage :
  Usage : miniunz [-exvlo] file.zip [file_to_extract] [-d extractdir]

  list the file in the zipfile, and print the content of FILE_ID.ZIP or README.TXT
    if it exists
*/


/* change_file_date : change the date/time of a file
    filename : the filename of the file where date/time must be modified
    dosdate : the new date at the MSDos format (4 bytes)
    tmu_date : the SAME new date at the tm_unz format */
void change_file_date(filename, dosdate, tmu_date)
     const
char* filename;
uLong dosdate;

tm_unz tmu_date;
{
#ifdef _WIN32
    HANDLE hFile;
    FILETIME ftm, ftLocal, ftCreate, ftLastAcc, ftLastWrite;

    hFile = CreateFileA(filename,GENERIC_READ | GENERIC_WRITE,
                        0,NULL,OPEN_EXISTING, 0,NULL);
    GetFileTime(hFile, &ftCreate, &ftLastAcc, &ftLastWrite);
    DosDateTimeToFileTime((WORD)(dosdate >> 16), (WORD)dosdate, &ftLocal);
    LocalFileTimeToFileTime(&ftLocal, &ftm);
    SetFileTime(hFile, &ftm, &ftLastAcc, &ftm);
    CloseHandle(hFile);
#else
#ifdef unix || __APPLE__
  struct utimbuf ut;
  struct tm newdate;
  newdate.tm_sec = tmu_date.tm_sec;
  newdate.tm_min=tmu_date.tm_min;
  newdate.tm_hour=tmu_date.tm_hour;
  newdate.tm_mday=tmu_date.tm_mday;
  newdate.tm_mon=tmu_date.tm_mon;
  if (tmu_date.tm_year > 1900)
      newdate.tm_year=tmu_date.tm_year - 1900;
  else
      newdate.tm_year=tmu_date.tm_year ;
  newdate.tm_isdst=-1;

  ut.actime=ut.modtime=mktime(&newdate);
  utime(filename,&ut);
#endif
#endif
}


/* mymkdir and change_file_date are not 100 % portable
   As I don't know well Unix, I wait feedback for the unix portion */

int mymkdir(dirname)
    const

char* dirname;
{
    int ret = 0;
#ifdef _WIN32
    ret = _mkdir(dirname);
#elif unix
    ret = mkdir (dirname,0775);
#elif __APPLE__
    ret = mkdir (dirname,0775);
#endif
    return ret;
}

int makedir(newdir)

char* newdir;
{
    char* buffer;
    char* p;
    int len = (int)strlen(newdir);

    if (len <= 0)
        return 0;

    buffer = (char*)malloc(len + 1);
    if (buffer == NULL)
    {
        printf("Error allocating memory\n");
        return UNZ_INTERNALERROR;
    }
    strcpy(buffer, newdir);

    if (buffer[len - 1] == '/')
    {
        buffer[len - 1] = '\0';
    }
    if (mymkdir(buffer) == 0)
    {
        free(buffer);
        return 1;
    }

    p = buffer + 1;
    while (1)
    {
        char hold;

        while (*p && *p != '\\' && *p != '/')
            p++;
        hold = *p;
        *p = 0;
        if ((mymkdir(buffer) == -1) && (errno == ENOENT))
        {
            printf("couldn't create directory %s\n", buffer);
            free(buffer);
            return 0;
        }
        if (hold == 0)
            break;
        *p++ = hold;
    }
    free(buffer);
    return 1;
}

void Display64BitsSize(ZPOS64_T n, int size_char)
{
    /* to avoid compatibility problem , we do here the conversion */
    char number[21];
    int offset = 19;
    int pos_string = 19;
    number[20] = 0;
    for (;;)
    {
        number[offset] = (char)((n % 10) + '0');
        if (number[offset] != '0')
            pos_string = offset;
        n /= 10;
        if (offset == 0)
            break;
        offset--;
    }
    {
        int size_display_string = 19 - pos_string;
        while (size_char > size_display_string)
        {
            size_char--;
            printf(" ");
        }
    }

    printf("%s", &number[pos_string]);
}

int do_list(uf)

unzFile uf;
{
    uLong i;
    unz_global_info64 gi;
    int err;

    err = unzGetGlobalInfo64(uf, &gi);
    if (err != UNZ_OK)
        printf("error %d with zipfile in unzGetGlobalInfo \n", err);
    printf("  Length  Method     Size Ratio   Date    Time   CRC-32     Name\n");
    printf("  ------  ------     ---- -----   ----    ----   ------     ----\n");
    for (i = 0; i < gi.number_entry; i++)
    {
        char filename_inzip[256];
        unz_file_info64 file_info;
        uLong ratio = 0;
        const char* string_method;
        char charCrypt = ' ';
        err = unzGetCurrentFileInfo64(uf, &file_info, filename_inzip, sizeof(filename_inzip),NULL, 0,NULL, 0);
        if (err != UNZ_OK)
        {
            printf("error %d with zipfile in unzGetCurrentFileInfo\n", err);
            break;
        }
        if (file_info.uncompressed_size > 0)
            ratio = (uLong)((file_info.compressed_size * 100) / file_info.uncompressed_size);

        /* display a '*' if the file is crypted */
        if ((file_info.flag & 1) != 0)
            charCrypt = '*';

        if (file_info.compression_method == 0)
            string_method = "Stored";
        else if (file_info.compression_method == Z_DEFLATED)
        {
            uInt iLevel = (uInt)((file_info.flag & 0x6) / 2);
            if (iLevel == 0)
                string_method = "Defl:N";
            else if (iLevel == 1)
                string_method = "Defl:X";
            else if ((iLevel == 2) || (iLevel == 3))
                string_method = "Defl:F"; /* 2:fast , 3 : extra fast*/
        }
        else if (file_info.compression_method == Z_BZIP2ED)
        {
            string_method = "BZip2 ";
        }
        else
            string_method = "Unkn. ";

        Display64BitsSize(file_info.uncompressed_size, 7);
        printf("  %6s%c", string_method, charCrypt);
        Display64BitsSize(file_info.compressed_size, 7);
        printf(" %3lu%%  %2.2lu-%2.2lu-%2.2lu  %2.2lu:%2.2lu  %8.8lx   %s\n",
               ratio,
               (uLong)file_info.tmu_date.tm_mon + 1,
               (uLong)file_info.tmu_date.tm_mday,
               (uLong)file_info.tmu_date.tm_year % 100,
               (uLong)file_info.tmu_date.tm_hour, (uLong)file_info.tmu_date.tm_min,
               (uLong)file_info.crc, filename_inzip);
        if ((i + 1) < gi.number_entry)
        {
            err = unzGoToNextFile(uf);
            if (err != UNZ_OK)
            {
                printf("error %d with zipfile in unzGoToNextFile\n", err);
                break;
            }
        }
    }

    return 0;
}


int do_extract_currentfile(uf, popt_extract_without_path, popt_overwrite, password)
unzFile uf;
const int* popt_extract_without_path;
int* popt_overwrite;

const char* password;
{
    char filename_inzip[256];
    char* filename_withoutpath;
    char* p;
    int err = UNZ_OK;
    FILE* fout = NULL;
    void* buf;
    uInt size_buf;

    unz_file_info64 file_info;
    uLong ratio = 0;
    err = unzGetCurrentFileInfo64(uf, &file_info, filename_inzip, sizeof(filename_inzip),NULL, 0,NULL, 0);

    if (err != UNZ_OK)
    {
        printf("error %d with zipfile in unzGetCurrentFileInfo\n", err);
        return err;
    }

    size_buf = WRITEBUFFERSIZE;
    buf = (void*)malloc(size_buf);
    if (buf == NULL)
    {
        printf("Error allocating memory\n");
        return UNZ_INTERNALERROR;
    }

    p = filename_withoutpath = filename_inzip;
    while ((*p) != '\0')
    {
        if (((*p) == '/') || ((*p) == '\\'))
            filename_withoutpath = p + 1;
        p++;
    }

    if ((*filename_withoutpath) == '\0')
    {
        if ((*popt_extract_without_path) == 0)
        {
            printf("creating directory: %s\n", filename_inzip);
            mymkdir(filename_inzip);
        }
    }
    else
    {
        const char* write_filename;
        int skip = 0;

        if ((*popt_extract_without_path) == 0)
            write_filename = filename_inzip;
        else
            write_filename = filename_withoutpath;

        err = unzOpenCurrentFilePassword(uf, password);
        if (err != UNZ_OK)
        {
            printf("error %d with zipfile in unzOpenCurrentFilePassword\n", err);
        }

        if (((*popt_overwrite) == 0) && (err == UNZ_OK))
        {
            char rep = 0;
            FILE* ftestexist;
            ftestexist = FOPEN_FUNC(write_filename,"rb");
            if (ftestexist != NULL)
            {
                fclose(ftestexist);
                do
                {
                    char answer[128];
                    int ret;

                    printf("The file %s exists. Overwrite ? [y]es, [n]o, [A]ll: ", write_filename);
                    ret = scanf("%1s", answer);
                    if (ret != 1)
                    {
                        exit(EXIT_FAILURE);
                    }
                    rep = answer[0];
                    if ((rep >= 'a') && (rep <= 'z'))
                        rep -= 0x20;
                }
                while ((rep != 'Y') && (rep != 'N') && (rep != 'A'));
            }

            if (rep == 'N')
                skip = 1;

            if (rep == 'A')
                *popt_overwrite = 1;
        }

        if ((skip == 0) && (err == UNZ_OK))
        {
            fout = FOPEN_FUNC(write_filename,"wb");
            /* some zipfile don't contain directory alone before file */
            if ((fout == NULL) && ((*popt_extract_without_path) == 0) &&
                (filename_withoutpath != (char*)filename_inzip))
            {
                char c = *(filename_withoutpath - 1);
                *(filename_withoutpath - 1) = '\0';
                makedir(write_filename);
                *(filename_withoutpath - 1) = c;
                fout = FOPEN_FUNC(write_filename,"wb");
            }

            if (fout == NULL)
            {
                printf("error opening %s\n", write_filename);
            }
        }

        if (fout != NULL)
        {
            printf(" extracting: %s\n", write_filename);

            do
            {
                err = unzReadCurrentFile(uf, buf, size_buf);
                if (err < 0)
                {
                    printf("error %d with zipfile in unzReadCurrentFile\n", err);
                    break;
                }
                if (err > 0)
                    if (fwrite(buf, err, 1, fout) != 1)
                    {
                        printf("error in writing extracted file\n");
                        err = UNZ_ERRNO;
                        break;
                    }
            }
            while (err > 0);
            if (fout)
                fclose(fout);

            if (err == 0)
                change_file_date(write_filename, file_info.dosDate,
                                 file_info.tmu_date);
        }

        if (err == UNZ_OK)
        {
            err = unzCloseCurrentFile(uf);
            if (err != UNZ_OK)
            {
                printf("error %d with zipfile in unzCloseCurrentFile\n", err);
            }
        }
        else
            unzCloseCurrentFile(uf); /* don't lose the error */
    }

    free(buf);
    return err;
}


int do_extract(uf, opt_extract_without_path, opt_overwrite, password)
unzFile uf;
int opt_extract_without_path;
int opt_overwrite;

const char* password;
{
    uLong i;
    unz_global_info64 gi;
    int err;
    FILE* fout = NULL;

    err = unzGetGlobalInfo64(uf, &gi);
    if (err != UNZ_OK)
        printf("error %d with zipfile in unzGetGlobalInfo \n", err);

    for (i = 0; i < gi.number_entry; i++)
    {
        if (do_extract_currentfile(uf, &opt_extract_without_path,
                                   &opt_overwrite,
                                   password) != UNZ_OK)
            break;

        if ((i + 1) < gi.number_entry)
        {
            err = unzGoToNextFile(uf);
            if (err != UNZ_OK)
            {
                printf("error %d with zipfile in unzGoToNextFile\n", err);
                break;
            }
        }
    }

    return 0;
}

int do_extract_onefile(uf, filename, opt_extract_without_path, opt_overwrite, password)
unzFile uf;
const char* filename;
int opt_extract_without_path;
int opt_overwrite;

const char* password;
{
    int err = UNZ_OK;
    if (unzLocateFile(uf, filename,CASESENSITIVITY) != UNZ_OK)
    {
        printf("file %s not found in the zipfile\n", filename);
        return 2;
    }

    if (do_extract_currentfile(uf, &opt_extract_without_path,
                               &opt_overwrite,
                               password) == UNZ_OK)
        return 0;
    else
        return 1;
}
